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https://www.readbyqxmd.com/read/29329645/polysaccharides-extracted-from-the-roots-of-bupleurum-chinense-dc-modulates-macrophage-functions
#1
Zhi-De Zhang, Hong Li, Fen Wan, Xiao-Yu Su, Yan Lu, Dao-Feng Chen, Yun-Yi Zhang
The present study aimed to investigate the effects of polysaccharides extracted from Bupleurum chinense DC (BCPs) on macrophage functions. In the in vivo experiment, 1 mL of 5% sodium thioglycollate was injected into the abdomen of the mice on Day 0 and macrophages were harvested on Day 4. The macrophages were cultured in plates and treated with different concentrations of BCPs and stimulus. Effects of BCPs on macrophage functions were assessed by chemotaxis assay, phagocytosis assay and Enzyme-Linked Immunosorbent Assay (ELISA)...
December 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/29315963/distinct-and-heterogeneous-trajectories-of-self-perceived-cognitive-impairment-among-asian-breast-cancer-survivors
#2
Terence Ng, Sreemanee Raaj Dorajoo, Yin Ting Cheung, Yick Ching Lam, Hui Ling Yeo, Maung Shwe, Yan Xiang Gan, Koon Mian Foo, Wei-Jen Kiley Loh, Si-Lin Koo, Amit Jain, Guek Eng Lee, Rebecca Dent, Yoon Sim Yap, Raymond Ng, Alexandre Chan
OBJECTIVES: Currently, there are no studies that have established the self-perceived cognitive trajectories experienced by breast cancer patients (BCPs) post-chemotherapy. Therefore, we characterized the long-term trajectory of self-perceived cognitive function among Asian early-stage BCPs using the minimal clinically important difference (MCID) of a subjective measure of cognitive function. METHODS: Early-stage BCPs who received chemotherapy were recruited and assessed at four time points: Before chemotherapy initiation (T1), 6 weeks post-chemotherapy initiation (T2), 12 weeks post-chemotherapy initiation (T3), and 15-months post-chemotherapy initiation (T4)...
January 9, 2018: Psycho-oncology
https://www.readbyqxmd.com/read/29301939/interleukin-10-suppresses-lysosome-mediated-killing-of-brucella-abortus-in-cultured-macrophages
#3
Huynh Tan Hop, Alisha Wehdnesday Bernardo Reyes, Tran Xuan Ngoc Huy, Lauren Togonon Arayan, WonGi Min, Hu Jang Lee, Man Hee Rhee, Hong Hee Chang, Suk Kim
Brucella abortus is a Gram-negative zoonotic pathogen for which there is no 100% effective vaccine. Phagosomes in B. abortus-infected cells fail to mature allowing the pathogen to survive and proliferate. Interleukin 10 (IL-10) promotes B. abortus persistence in macrophages by mechanisms that are not fully understood. In this study, we investigated the regulatory role of IL-10 in the immune response to B. abortus infection. B. abortus-infected macrophages were treated with either IL10 siRNA or recombinant IL-10 (rIL-10) and the expression of phagolysosome- or inflammation-related genes was evaluated by qRT-PCR and Western blot...
January 4, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29283195/why-bond-critical-points-are-not-bond-critical-points
#4
Shant Shahbazian
Equating (3, -1) critical points (CPs), derived from the topological analysis of the electron densities, to chemical bonds has triggered a lot of confusion in recent years. Part of this confusion stems from calling these CPs "bond" CPs (BCPs). While the origin of this terminology is traceable to the late seventies and beginning of eighties, when it sounded reasonable, new computational studies conducted on molecular electron densities cast serious doubt on the supposed universal equivalence between the chemical bonds and (3, -1) CPs...
December 28, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29211161/profile-of-demand-and-continuous-cash-benefits-bcp-granted-to-children-diagnosed-with-microcephaly-in-brazil
#5
Éverton Luís Pereira, Josierton Cruz Bezerra, Jonas Lotufo Brant, Wildo Navegantes de Araújo, Leonor Maria Pacheco Santos
The Brazilian Federal Constitution of 1988 introduced the Continuous Cash Benefits (BCP), allowing the inclusion of people with disabilities. This is a descriptive study with aggregate municipal data about the time and geographic distribution of the incidence of microcephaly related to the Zika virus in Brazil and data of the BCP grants to children diagnosed with microcephaly. Data on the demand and BCP grants to children with microcephaly since 2009 are shown. Cases of microcephaly and/or central nervous system disorders were obtained from the Ministry of Health and totaled 2,366 confirmed cases from January 1, 2015 to December 31, 2016...
November 2017: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/29205788/normal-variation-of-bone-marrow-b-cell-precursors-according-to-age-reference-ranges-for-studies-in-myelodysplastic-syndromes-in-brazil
#6
I Lorand-Metze, A L Longhini, G Oliveira-Duarte, R P Correia, M C Santos-Silva, M Yamamoto, A F Sandes, A F Oliveira, E X Souto, Mrv Ikoma, F G Pereira-Cunha, M Beltrame, Konradin Metze
BACKGROUND: Normal B lymphoid maturation occurs in bone marrow (BM) throughout life, but immature B-cell progenitors (BCPs) are more numerous in children than in adults. To assess the normal values according to age became important as BCPs are decreased in myelodysplastic syndromes and have been considered an important diagnostic and prognostic feature in these clonal disorders. METHODS: in a multicenter retrospective study from the Brazilian Group of Flow Cytometry we analyzed the variation of BCPs in normal BM according to age and technical peculiarities of each laboratory...
December 2, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/29182294/straightforward-integration-flow-of-a-silicon-containing-block-copolymer-for-line-space-patterning
#7
Antoine Legrain, Guillaume Fleury, Muhammad Mumtaz, Christophe Navarro, Javier Arias-Zapata, Xavier Chevalier, Ian Cayrefourcq, Marc Zelsmann
A promising alternative for the next-generation lithography is based on the directed self-assembly of block copolymers (BCPs) used as a bottom-up tool for the definition of nanometric features. Herein, a straightforward integration flow for line-space patterning is reported for a silicon BCP system, that is, poly(1,1-dimethylsilacyclobutane)-b-poly(styrene) (PDMSB-b-PS), able to define sub 15 nm features. Both in-plane cylindrical (L0 = 20.7 nm) and out-of-plane lamellar structures (L0 = 23.2 nm) formed through a rapid thermal annealing-10 min at 180 °C-were successfully integrated using graphoepitaxy to provide a long-range ordering of the BCP structure without the use of underlayers or top coats...
November 28, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29164344/theoretical-investigation-on-the-covalence-in-agrnx-and-xagrn-x%C3%A2-%C3%A2-f-i
#8
Li Xinying
CCSD(T) calculations were performed to investigate the stabilities and interaction mechanisms of the AgRnX and XAgRn (X = F - I) series. Dissociation energies and frontier orbital properties demonstrate an increased trend of stabilities. Ag spd hybrids and Rn/X sp hybrids come into the σAg-Rn and σAg-X bonding orbital. The nature of Ag-Rn, Ag-X and Rn-X interactions were investigated by atoms in molecules (AIM) theory. The negative energy density and positive Laplacian values, as well as small electron densities at bond critical points (BCPs), characterize the moderate strength with partial covalence of interactions...
November 21, 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/29156916/a-critical-evaluation-of-quality-of-life-in-clinical-trials-of-breast-cancer-patients-treated-with-radiation-therapy
#9
Gustavo N Marta, Fabio Y Moraes, Elton T T Leite, Edward Chow, David Cella, Andrew Bottomley
The aim of this study was to investigate the extent to which health-related quality of life (HRQOL) parameters have been reported in phase III trials with breast cancer patients (BCPs) who received radiation therapy (RT). We also examine the frequency and correlates of significant HRQOL gains. A systematic review was conducted. When HRQOL was a study endpoint, we extracted data on the instruments used for HRQOL analysis, assessing if there was formal statistical comparison between study groups and the results of such comparisons as reported by the authors of the studies...
October 24, 2017: Annals of Palliative Medicine
https://www.readbyqxmd.com/read/29149720/a-robust-strategy-for-preparation-of-sequential-stimuli-responsive-block-copolymer-prodrugs-via-thiolactone-chemistry-to-overcome-multiple-anticancer-drug-delivery-barriers
#10
Wendong Ke, Wei Yin, Zengshi Zha, Jean Felix Mukerabigwi, Weijian Chen, Yuheng Wang, Chuanxin He, Zhishen Ge
Block copolymer prodrugs (BCPs) have attracted considerable attentions in clinical translation of nanomedicine owing to their self-assembly into well-defined core-shell nanoparticles for improved pharmacokinetics, stability in blood circulation without drug leakage, and optimized biodistribution. However, a cascade of physiological barriers against specific delivery of drugs into tumor cells limit the final therapeutic efficacy. Herein, we report a robust and facile strategy based on thiolactone chemistry to fabricate well-defined BCPs with sequential tumor pH-promoted cellular internalization and intracellular stimuli-responsive drug release...
November 9, 2017: Biomaterials
https://www.readbyqxmd.com/read/29136475/through-thickness-vertically-ordered-lamellar-block-copolymer-thin-films-on-unmodified-quartz-with-cold-zone-annealing
#11
Monali N Basutkar, Saumil Samant, Joseph Strzalka, Kevin G Yager, Gurpreet Singh, Alamgir Karim
Template-free directed self-assembly of ultrathin (approximately tens of nanometers) lamellar block copolymer (l-BCP) films into vertically oriented nanodomains holds much technological relevance for the fabrication of next-generation devices from nanoelectronics to nanomembranes due to domain interconnectivity and high interfacial area. We report for the first time the formation of full through-thickness vertically oriented lamellar domains in 100 nm thin polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) films on quartz substrate, achieved without any PMMA-block wetting layer formation, quartz surface modification (templating chemical, topographical) or system modifications (added surfactant, top-layer coat)...
November 21, 2017: Nano Letters
https://www.readbyqxmd.com/read/29125196/an-interacting-quantum-atom-study-of-model-sn-2-reactions-x-%C3%A2-%C3%A2-%C3%A2-ch3-x-x%C3%A2-%C3%A2-f-cl-br-and-i
#12
Ibon Alkorta, Joseph C R Thacker, Paul L A Popelier
The quantum chemical topology method has been used to analyze the energetic profiles in the X(-)  + CH3 X → XCH3  + X(-) SN 2 reactions, with X = F, Cl, Br, and I. The evolution of the electron density properties at the BCPs along the reaction coordinate has been analysed. The interacting quantum atoms (IQA) method has been used to evaluate the intra-atomic and interatomic energy variations along the reaction path. The different energetic terms have been examined by the relative energy gradient method and the ANANKE program, which enables automatic and unbiased IQA analysis...
November 10, 2017: Journal of Computational Chemistry
https://www.readbyqxmd.com/read/29120972/comparison-of-anti-xa-and-activated-partial-thromboplastin-time-monitoring-for-heparin-dosing-in-vascular-surgery-patients-a-single-center-retrospective-study
#13
Elsie Rizk, Allison D Wilson, Michelle U Murillo, David R Putney, Bcps-Aq Cardiology
BACKGROUND: Vascular surgery patients often require anticoagulation with intravenous unfractionated heparin monitored via anti-Xa levels or the activated partial thromboplastin time (aPTT). This study compares the two monitoring strategies in terms of major bleeding events in the vascular surgery population. METHODS: This was a single center, retrospective study that included patients treated with a pharmacy-managed heparin protocol monitored by either anti-Xa or aPTT after vascular surgery...
November 8, 2017: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/29111741/theoretical-probing-of-weak-anion-cation-interactions-in-certain-pyridinium-based-ionic-liquid-ion-pairs-and-the-application-of-molecular-electrostatic-potential-in-their-ionic-crystal-density-determination-a-comparative-study-using-density-functional-approach
#14
Aswathy Joseph, Vibin Ipe Thomas, Gaweł Żyła, Padmanabhan Sridharan Alapat, Suresh Mathew
A comprehensive study on the structure, nature of interaction and properties of six ionic pairs of 1-butylpyridinium and 1-butyl-4-methylpyridinium cations in combination with tetrafluoroborate (BF4-), chloride (Cl-) and bromide (Br-) anions have been carried out using Density Functional Theory (DFT). The anion-cation interaction energy (ΔEint), theoretical band gap, molecular orbital energy-order, DFT-based chemical activity descriptors: chemical potential (μ), chemical hardness (η) and electrophilicity index (ω) and distribution of density of states (DOS) of these ion-pairs were investigated...
November 7, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29078379/controlling-orientational-order-in-block-copolymers-using-low-intensity-magnetic-fields
#15
Manesh Gopinadhan, Youngwoo Choo, Kohsuke Kawabata, Gilad Kaufman, Xunda Feng, Xiaojun Di, Yekaterina Rokhlenko, Lalit H Mahajan, Dennis Ndaya, Rajeswari M Kasi, Chinedum O Osuji
The interaction of fields with condensed matter during phase transitions produces a rich variety of physical phenomena. Self-assembly of liquid crystalline block copolymers (LC BCPs) in the presence of a magnetic field, for example, can result in highly oriented microstructures due to the LC BCP's anisotropic magnetic susceptibility. We show that such oriented mesophases can be produced using low-intensity fields (<0.5 T) that are accessible using permanent magnets, in contrast to the high fields (>4 T) and superconducting magnets required to date...
November 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29039679/effect-of-nanostructured-domains-in-self-assembled-block-copolymer-films-on-sequential-infiltration-synthesis
#16
Qing Peng, Yu-Chih Tseng, Yun Long, Anil U Mane, Shane DiDona, Seth B Darling, Jeffrey W Elam
There are broad interests in selective and localized synthesis in nanodomains of self-assembled block copolymers (BCPs) for a variety of applications. Sequential infiltration synthesis (SIS) shows promise to selectively grow a controllable amount of materials in one type of nanodomain of a self-assembled BCP film. However, the effects of nanostructured domains in a BCP film and SIS cycles on the material growth behavior of SIS are rarely studied. In this work, we investigated the growth behavior of TiO2 SIS within self-assembled polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) films and the two corresponding pure homopolymer films (PS and PMMA) by using in situ quartz crystal microbalance (QCM)...
November 7, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28973987/creating-active-device-materials-for-nanoelectronics-using-block-copolymer-lithography
#17
Cian Cummins, Alan P Bell, Michael A Morris
The prolonged and aggressive nature of scaling to augment the performance of silicon integrated circuits (ICs) and the technical challenges and costs associated with this has led to the study of alternative materials that can use processing schemes analogous to semiconductor manufacturing. We examine the status of recent efforts to develop active device elements using nontraditional lithography in this article, with a specific focus on block copolymer (BCP) feature patterning. An elegant route is demonstrated using directed self-assembly (DSA) of BCPs for the fabrication of aligned tungsten trioxide (WO₃) nanowires towards nanoelectronic device application...
September 30, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28959807/carbohydrate-based-block-copolymer-systems-directed-self-assembly-for-nanolithography-applications
#18
I Otsuka, N Nilsson, D B Suyatin, I Maximov, R Borsali
Self-assembly of block copolymers (BCPs) provides an attractive nanolithography approach, which looks especially promising for fabrication of regular structures with characteristic sizes below 10 nm. Nevertheless, directed self-assembly (DSA) and pattern transfer for BCPs with such small features remain to be a challenge. Here we demonstrate DSA of the maltoheptaose-block-polystyrene (MH1,2k-b-PS4,5k) BCP system using graphoepitaxy. BCP thin films were self-organized by solvent vapor annealing in tetrahydrofuran (THF) and water into sub-10 nm scale cylinders of the maltoheptaose (MH) block oriented horizontally or perpendicularly to the surface in a polystyrene (PS) matrix...
October 18, 2017: Soft Matter
https://www.readbyqxmd.com/read/28949359/macroscopically-ordered-hexagonal-arrays-by-directed-self-assembly-of-block-copolymers-with-minimal-topographic-patterns
#19
Jaewon Choi, Ilja Gunkel, Yinyong Li, Zhiwei Sun, Feng Liu, Hyeyoung Kim, Kenneth R Carter, Thomas P Russell
A simple and robust method has been developed for the generation of macroscopically ordered hexagonal arrays from the directed self-assembly (DSA) of cylinder-forming block copolymers (BCPs) based on minimal trench patterns with solvent vapor annealing. The use of minimal trench patterns allows us to probe the guided hexagonal arrays of cylindrical microdomains using grazing incidence small angle X-ray scattering (GISAXS), where the sample stage is rotated on the basis of the six-fold symmetry of a hexagonal system...
October 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28944392/bonding-and-spectroscopic-analyses-of-n2o-cs2-and-n2o-ocs-heterodimer-complexes-and-their-atmospheric-consequences
#20
Samiyara Begum, Ranga Subramanian
Different isomers of the valence isoelectronic pairs of the heterodimers N2O-SCS and N2O-OCS were investigated using MP2 and CCSD(T) methods with the aug-cc-pVXZ (X = D, T) basis set with anharmonic frequency calculations. Interaction energies of both the heterodimers were estimated at the CBS limit and for CCSD(T)/aug-cc-pVTZ. One isomer was located for the N2O-SCS heterodimer. In the case of the N2O-OCS heterodimer, three planar slipped-parallel isomers were characterized. There was no significant change in electron density at the bond critical points (BCPs) of various intra-bonds but the presence of inter-bonds with a weak electron density at the BCPs in the complexes was found as per the results from the quantum theory of atoms in molecules (QTAIM) analysis...
October 4, 2017: Physical Chemistry Chemical Physics: PCCP
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